27131745 has 32 divisors (see below), whose sum is σ = 46455552. Its totient is φ = 13473792.

The previous prime is 27131729. The next prime is 27131759. The reversal of 27131745 is 54713172.

It is not a de Polignac number, because 27131745 - 2⁴ = 27131729 is a prime.

It is a super-2 number, since 2×27131745² = 1472263173490050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25749 + ... + 26781.

It is an arithmetic number, because the mean of its divisors is an integer number (1451736).

Almost surely, 2^27131745 is an apocalyptic number.

It is an amenable number.

27131745 is a deficient number, since it is larger than the sum of its proper divisors (19323807).

27131745 is a wasteful number, since it uses less digits than its factorization.

27131745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161.

The product of its digits is 5880, while the sum is 30.

The square root of 27131745 is about 5208.8141644716. The cubic root of 27131745 is about 300.4871529562.

The spelling of 27131745 in words is "twenty-seven million, one hundred thirty-one thousand, seven hundred forty-five".